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1 IEQ Management Plan GH Phipps Construction Companies 5995 Greenwood Plaza Blvd., Suite 100 Greenwood Village, Colorado PHONE Denver Museum of Nature and Science ECF Addition 1. Intent: Reduce poor, indoor air quality resulting from the construction/renovation process to help sustain the comfort and well-being of construction workers and building occupants. 2. Strategy: Implement an IAQ (Indoor Air Quality) Management Plan to protect the HVAC system during construction, control pollutant sources, and interrupt pathways for contamination as required to meet LEED-NC Version 2009, Indoor Environmental Quality Credit 3.1 and Credit 3.2. Sequence the installation of materials to avoid contamination of absorptive materials such as insulation, carpeting, ceiling tiles and gypsum wallboard. 3. Requirements: Develop and implement an IAQ Management Plan for the construction and pre-occupancy phases of the building as follows: A. During construction, meet or exceed the Control Measures of the Sheet Metal and Air Conditioning National Contractors Association (SMACNA) IAQ Guideline for Occupied Buildings under construction, 2 nd Edition 2007, ANSI/SMACNA (Chapter 3). B. Protect stored, on-site or installed absorptive materials from moisture damage A-2 C. If permanently installed, air handlers are used during construction, filtration media with a Minimum Efficiency Reporting Value (MERV) of 8 shall be used at each return air grille, as determined by ASHRAE (with errata but without addenda). Replace all filtration media immediately, prior to occupancy A-3 D. After construction ends, prior to occupancy and with all interior finishes installed, perform a building flush-out by supplying a total air volume of 14,000 cu.ft. of outdoor air per sq.ft. of floor area while maintaining an internal temperature of at least 60 degrees Fahrenheit and relative humidity no higher than 60% B-2 E. OR if occupancy is desired prior to completion of the flush-out, the space may be occupied following delivery of a minimum of 3,500 cu.ft. of outdoor air per sq.ft. of floor area to the space. Once a space is occupied, it shall be ventilated at a minimum rate of 0.30 cfm/sq.ft. of outside air or the design minimum outside air rate determined in EQ Prerequisite 1, whichever is greater. During each day of the flush-out period, ventilation shall begin a minimum of three hours prior to occupancy and continue during occupancy. These conditions shall be maintained until a total of 14,000 cu.ft./sq.ft. of outside air has been delivered to the space B-2 F. Temperature and humidity must be monitored and recorded during the building flushout (regardless of approach taken) and if temperature and/or humidity requirements are not met, the building flushout must be extended to account for any additional time necessary Page 1 of 5

2 to reach the 14,000 cu.ft./sq.ft. of outside air requirement. Temperature and humidity data gathered during the building flushout shall be uploaded to LEED-Online as supplemental documentation for EQc B-2 4. Coordination / Communication: Meetings: The Construction Manager will conduct Construction IAQ meetings. Meetings shall include subcontractors affected by the Construction IAQ Management Plan. The Construction IAQ Management Plan will be distributed to each new subcontractor. At a minimum, construction IAQ goals and issues will be discussed at the following meetings: A. Pre-bid packages B. Pre-construction meeting C. Regular subcontractor jobsite/safety meetings 5. IAQ Management Plan Implementation: Manager: The Construction Manager shall designate an on-site party (or parties) responsible for instructing workers and overseeing and recording results of the Construction IAQ Management Plan for the project and to mitigate any IAQ problems that are identified. Distribution: The Construction Manager shall distribute copies of the Construction IAQ Management Plan to the Job Site Foreman and each Subcontractor. Instruction: The Construction Manager will provide on-site instruction of cleaning activities, building material storage, isolation methods and construction activity schedules to be used by all parties during the appropriate stages of the Project. Construction material storage facilities: The Construction Manager will designate a specific area, for storage of porous or absorptive materials, which is clean and protected from exposure to moisture. HVAC Protection: A-1 a. A. (Preferred) If the HVAC system is not used during construction, the supply and return air system openings shall be sealed with plastic to prevent the accumulation of dust and debris in the duct system. The diffusers should also be sealed in plastic. This activity is the responsibility of the Mechanical Contractor. B. If it is determined acceptable to use the new mechanical system for temporary heating or building pressurization purposes, the return air system openings shall have temporary filters of a MERV 8 and the system shall receive frequent periodic maintenance if the HVAC system is being utilized. Immediately prior to occupancy, the filtration media will be replaced with new filters of a MERV 13. This activity is the responsibility of the Mechanical Contractor. C. The Mechanical Contractor shall provide a list all filtration media used during construction and immediately before occupancy to the Construction Manager that includes the manufacturer, model number, MERV rating, and location of installed filter. Page 2 of 5

3 D. All return air openings will be protected with plastic from foreign debris and construction pollution until they are exposed for building ventilations use, however, RK will not be responsible for additional work as it relates to the mitigation of high dust or pollution caused by non-related work; i.e. drywall sanding, concrete cutting, masonry work, wood sawing, insulating, etc... If such non-related work contaminates ducts, GH Phipps or accossiated sub of non-related work will be responsible for professional cleaning. E. The mechanical and electrical rooms should not be used to store construction or waste materials. Rooms should be kept clean and neat. This activity is the responsibility of all Subcontractors. F. Pictures will be submitted by the Mechanical Contractor to the Construction Manager, as called out in specification section B 8. Source Control: A-1 b. A. Low VOC products as indicated by specification will be used to reduce potential problems (reference LEED Environmental Quality Credit 4). Using low VOC materials are the responsibility of the subcontractors to meet the specifications. This activity is the responsibility of the Construction Manager. B. Restrict traffic volume or prohibit idling of motor vehicles where emissions could be drawn into the building. This activity is the responsibility if the Construction Manager. C. Use electric or natural gas alternatives in place of gasoline and diesel equipment where possible and practical. Cycle equipment off when not in use or needed. Subcontractors will be responsible and coordinate with the Construction Manager. D. Portable fan systems may be used to exhaust pollution sources, taking care to ensure that the exhaust does not re-circulate back into the building. Subcontractors are responsible to determine needs and coordinate with the Construction Manager. E. Containers of wet products should be kept closed as much as possible. Waste materials that can release odor or dust should be covered or sealed. This activity is the responsibility of the Construction Manager. F. Containers housing toxic materials shall be covered or re-sealed and isolated. See Construction Waste Management Plan. Coordinate activities with Construction Manager. G. Materials in transport will be covered and kept dry for the duration of the trip to the project site. Materials will be either covered/secured in plastic, placed in a watertight container, or, if none of these options are available, then delivery will be coordinated with the Construction Manager based on weather conditions. H. Materials delivered and stored on-site will be covered with plastic and kept weather tight until they are installed. Coordinate activity with Construction Manager. I. Materials ready for installation will be installed in weather-tight conditions. Materials will not be installed until verification that the risk of water damaged to materials is minimized. Coordinate activity with Construction Manager. J. Absorptive materials such as carpet and acoustical ceilings will be installed as late as possible during construction of the project and after the activities that create odors or gases (painting and Page 3 of 5

4 staining) have been completed. Coordinate activity with Construction Manager. Pathway Interruption: A-1 c. A. When needed, dust curtains or temporary enclosures will be used to prevent dust from migrating to other areas. Coordinate activity with Construction Manager. B. Pollutant sources will be located as far as possible from supply ducts and areas occupied by workers when feasible. During a high-polluting activity, the supply and exhaust air systems may need to be shut down or isolated. Coordinate activity with Construction Manager. C. During construction, clean areas or occupied areas will be isolated to prevent contamination. Pressure differentials shall be used to prevent contaminated air from entering clean areas. Coordinate activity with Construction Manager. D. Depending on climate, ventilation will be set to 100% outside air to exhaust contaminated air directly outside during installation of VOC emitting materials. Schedule activities with Construction Manager and Mechanical Contractor. Housekeeping: A-1 d. A. A floor-sweeping compound will be used to minimize the amount of dust that becomes airborne. Effective dust collection, such as a damp cloth, wet mop, vacuum with particulate filters or a wet scrubber should be used. The building will be swept daily in order to keep all construction dust to a minimum. This activity is the responsibility of all contractors. Coordinate activity with Construction Manager. B. Cleaning activities concentrated on the HVAC equipment and building spaces will be performed to remove contaminants from the building prior to occupancy. All coils, air filters, fans and ductwork should remain cleaned during installation and should be cleaned prior to performing the testing, adjusting and balancing of the systems. Activity is the responsibility of the Mechanical Contractor. C. Accumulations of water inside the building will be removed. Protect porous materials such as insulation and ceiling tile from exposure to moisture. This activity is the responsibility of the Construction Manager. D. Provide photographs during construction of the above activities to document compliance. This activity is the responsibility of the Construction Manager. Scheduling: A-1 e. A. Activities that produce pollution, or may use high VOC level products, may need to be scheduled during off-hours. This may include products such as paints, sealers, insulation, adhesives, caulking and cleaners. Schedule activities with the Construction Manager. B. Building occupancy and construction shall not coincide. This is activity is the responsibility of the Construction Manager. Page 4 of 5

5 C. Immediately upon completion of construction and prior to occupancy, all filtration media shall be replaced. This activity is the responsibility of the Mechanical Contractor. D. Dates of building flush-out should be on the Construction Schedule as described in the requirements section. 6. Construction Indoor Air Quality Management Documentation: A. A letter declaring that the Construction Manager has implemented the plan. B. Confirmation of use of the permanently installed air handling equipment. C. A list of all filtration media used during construction and immediately before occupancy including the manufacturer, model number, MERV rating, and location of installed filters. D. At a minimum photographs taken at two different occasions during construction and identification of the IAQ management approach illustrated in the photo, such as protection of ducts or storage of absorptive materials. Photographs must illustrate and indicate all five SMACNA IAQ management approaches (HVAC Protection, Source Control, Pathway Interruption, Housekeeping, and Scheduling). Photographs must be date stamped. E. Construction Schedule with building flushout period listed. F. Description of the flush-out procedure, length of time required for flush-out and the volume of air flushed-out. Temperature and humidity data gathered during the building flushout shall be uploaded to LEED Online as supplemental documentation for EQc3.2. Page 5 of 5

CONSTRUCTION IAQ MANAGEMENT PLAN During Construction The LEED requirements with which this Indoor Air Quality Plan complies are as follows: OVERVIEW EQc3.1 Construction IAQ Management Plan During Construction

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